Double Cluster
E100905
The Double Cluster is a striking pair of young, massive open star clusters in the constellation Perseus, often observed together as a rich, densely packed stellar grouping in the Milky Way.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Double Cluster canonical | 3 |
| Double Cluster in Perseus | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T868804 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Double Cluster Context triple: [Orion Arm, contains, Double Cluster]
-
A.
Stephan's Quintet
Stephan's Quintet is a visually striking compact group of five galaxies in the constellation Pegasus, famous for their complex gravitational interactions and dramatic appearance in astronomical imagery.
-
B.
Pleiades
The Pleiades are a famous open star cluster in the constellation Taurus, often known as the Seven Sisters in Greek mythology.
-
C.
Magellanic Clouds
The Magellanic Clouds are two irregular dwarf galaxies orbiting the Milky Way, prominently visible from the Southern Hemisphere as hazy patches in the night sky.
-
D.
Carina Nebula
The Carina Nebula is a vast, active star-forming region in the Milky Way known for its towering gas and dust pillars and dramatic young stellar clusters.
-
E.
globular star cluster M13
Globular star cluster M13, also known as the Great Hercules Cluster, is a dense, bright spherical collection of hundreds of thousands of ancient stars located in the constellation Hercules and is one of the most prominent globular clusters visible from Earth.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Double Cluster Target entity description: The Double Cluster is a striking pair of young, massive open star clusters in the constellation Perseus, often observed together as a rich, densely packed stellar grouping in the Milky Way.
-
A.
Stephan's Quintet
Stephan's Quintet is a visually striking compact group of five galaxies in the constellation Pegasus, famous for their complex gravitational interactions and dramatic appearance in astronomical imagery.
-
B.
Pleiades
The Pleiades are a famous open star cluster in the constellation Taurus, often known as the Seven Sisters in Greek mythology.
-
C.
Magellanic Clouds
The Magellanic Clouds are two irregular dwarf galaxies orbiting the Milky Way, prominently visible from the Southern Hemisphere as hazy patches in the night sky.
-
D.
Carina Nebula
The Carina Nebula is a vast, active star-forming region in the Milky Way known for its towering gas and dust pillars and dramatic young stellar clusters.
-
E.
globular star cluster M13
Globular star cluster M13, also known as the Great Hercules Cluster, is a dense, bright spherical collection of hundreds of thousands of ancient stars located in the constellation Hercules and is one of the most prominent globular clusters visible from Earth.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
Milky Way star cluster
ⓘ
deep-sky object ⓘ open star cluster pair ⓘ |
| age |
~12.8 million years
ⓘ
~14 million years ⓘ |
| angularSize | ~60 arcminutes ⓘ |
| apparentMagnitudeV | 3.7 ⓘ |
| appearsAs | nebulous patch to naked eye ⓘ |
| bestSeenIn |
autumn
ⓘ
winter ⓘ |
| catalogDesignation |
Caldwell 14
ⓘ
Melotte 13 and Melotte 14 ⓘ Perseus constellation ⓘ
surface form:
h Persei and χ Persei
|
| containsStarType |
B-type stars
ⓘ
O-type stars ⓘ red supergiants ⓘ |
| declination | +57° 08′ ⓘ |
| distanceFromEarth |
~2,300 parsecs
ⓘ
~7,500 light-years ⓘ |
| hasApproximateStarCount | several hundred stars per cluster ⓘ |
| hasCommonName |
Double Cluster
self-linksurface differs
ⓘ
surface form:
Double Cluster in Perseus
|
| hasComponent |
NGC 869
ⓘ
NGC 884 ⓘ |
| hasDiscoveryStatus | known since antiquity ⓘ |
| hasGalacticLatitude | +4.3 degrees (approximate) ⓘ |
| hasGalacticLongitude | 134.6 degrees (approximate) ⓘ |
| hasIntegratedSpectralType | B-type dominated ⓘ |
| hasSpectralDominance | blue-white ⓘ |
| isMassiveCluster | true ⓘ |
| isNear |
Cassiopeia
ⓘ
surface form:
constellation Cassiopeia
|
| isPartOf |
Perseus constellation
ⓘ
surface form:
Perseus constellation region
|
| isPopularTargetFor |
amateur astronomers
ⓘ
astrophotographers ⓘ |
| isRichCluster | true ⓘ |
| isUsedForStudyOf |
massive star formation
ⓘ
open cluster dynamics ⓘ stellar evolution ⓘ |
| isVisibleFrom | Northern Hemisphere ⓘ |
| isYoungCluster | true ⓘ |
| liesInDirectionOf |
Perseus OB2 association
ⓘ
surface form:
Perseus OB association
|
| locatedIn | Perseus Arm ⓘ |
| locatedInConstellation | Perseus ⓘ |
| locatedInGalaxy | Milky Way ⓘ |
| observedWith |
binoculars
ⓘ
small telescopes ⓘ |
| rightAscension | 02h 19m ⓘ |
| visibleToNakedEye | true ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Double Cluster Description of subject: The Double Cluster is a striking pair of young, massive open star clusters in the constellation Perseus, often observed together as a rich, densely packed stellar grouping in the Milky Way.
Referenced by (5)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Double Cluster in Perseus
this entity surface form:
Double Cluster in Perseus